These questions about M&M's first edition were posed to Steve Kenson--and then he answered them! Steve's now providing official answers to second edition questions, but we've archived this forum for you to search.

Does the the Subtle extra on a travel power do anything? In particular Teleport?

I've handled it that the character can make Move Silently checks while using the power. For example Nightcrawler's Teleport isn't Subtle (there's a noise and a cloud of smoke); a character with Subtle Teleport might just "fade in" without any noise or other visual effects.

I have a small stealthy character with Blending (so see See Invis won't spot him) and Subtle Teleport. I think that'd allow him to remain hidden while Teleporting around.

I would agree.

If he attacks in Melee while hidden then Teleports away is still visible to them target or reroll Hide?